Hoeace f



(No Model.)

H. P. HODGES.

PRESSURE REGULATING VALVE.

No. 290,429 Patented Dec. 18, 1883 Darren STATES PATENT GFFICEQ HORACE F. HODGES, OF CHELSEA, ASSIGNOR TO CHARLES F. PAYNE, OF

GROVELAND, AND GEORGE H. SPENCER, OF FITCHBUBG, MASS.

PRESSURE- REG U LATING VALVE.

SPECIFICATION forming part of Letters Patent No. 290,429, dated December 18, 1883. Application filed April 23, 1883. (No model.)

To aZZ whom it may concern):

Be it known that I, HORACE F. Honens, a citizen of the United States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Pressure-Regulating Valves, of which the following is a specification.

This invention relates to an improvement in that class of valves in which a certain desired pressure, which is variable at will, is maintained beyond said valve without regard to the pressure of the steam, liquid, or gas which may be led into it.

The invention consists in a perfectly-balanced valve having its stem influenced at one end by the pressure of the steam, liquid, or gas which passes through it, and at the other by a regulating -spring, whereby when the said pressure exceeds a certain amount the valve is automatically closed until the pressure decreases below the limit, when the valve is again opened by the spring.

Referring to the accompanying drawings, Figure 1 is a side View of a valve embodying my invention. Fig. 2 is a longitudinalsection of the same. Fig. 8 is a View of the ingress end. Fig. 4 is a transverse section on line 2 z of Fig. 2. Fig. 5 is an end view of the valve.

Similar letters indicate like parts in the several figures.

A is the main body of the valve, to be attached to the ingress-pipe and containing the valve-chamber A, having the ports I) b, which are placed opposite to each other in pairs.

B isa shell or coupling for connecting the valve with the egress-pipe.

C is a balanced valve consisting of a short tube accurately fitting the valve-chamber A, and provided with means of attachment to the valve-rod D, which latter passes through the stuffing-boxes H and 1, arranged, respectively, at opposite ends of the valve-chamber. The

valve-rod terminates at one end outside of the stuffing-box H, and within the shell or coupling B, and at the other end outside the stuffing-box I in athreaded rod, E, passing through the cross head' F, which is secured to the body of the valve by means of rods G G. The rpd E is surrounded by a spiral spring, K, bearing at one end against the cross-head F and at the other against the nut e, by means of which latter the tension of the spring is increased or lessened, as desired.

The operation is as follows: Thebody of the valve being attached to the ingress-pipe,which connects with the source of supply of steam or other fluid, and the coupling B to the egress-pipe, which conducts the steam, 850., to the point where it is required for use, steam passes into the valve-chamber A and through the ports 1) into the space within the shell or coupling B, and will flow freely through the valve so long as the pressure within the coupling B does not exceed the power exerted by the.

spring K; but when it does exceed such power the rod D, and with it the balanced valve C,

is moved toward the spring K, thus closing the ports b wholly or partially. As the press ure within the coupling B decreases below the tension of the spring K, said spring moves the rod D back again, thus opening the ports I), from which it will be seen that a nearly 0011- stant even pressure will be maintained within the coupling B, regardless of the pressure in the valve-chamber.

It will be evident that the pressure in the chamber A will be exerted equally on both ends of the valve C, whether the latter be open or closed, and when closed the effort of the steam to escape through the ports I) will be neutralized by their positions being at opposite points, thus leaving theend of the rod in the shell B the only portion at all affected by the pressure. 7

v Vhat I claim as my invention is-- 1. A valve composed of a cylindrical chamber having one or more pairs of :ports placed opposite each other in the sides of 7 said chamber, and a short tube open at both ends and fitted to slide in said chamber and attached to a stem, all substantially as shown and described.

2. A tubular balanced valve having one end of its stem projecting through one end of the main body of said valve and terminating in a threaded rod outside of said valve, and proand spring K, and the cross-head F,- and rods vided with a tension-spring, the other end of G, substantially as shown and described.

the stem passing through the opposite end of In testimony whereof Ihave signed my name the valve and terminating in the egress-pipe, to this specification in the presence of two 5 substantially as shown and described. subscribing witnesses.

3. The combination of the body A, having HORACE F. HODGES. the stnfiing-boxes H I, and the chamber A, \Vitnesscs: provided with the ports I), the stem D, carry- Jos. H. ADAMS,

ing the open tubular slide-valve G, the nut c, E. PLANTA. 

